Timepiece



Aprnl 16, 1935. E. E. BALDWIN 1,997,570

TIMEPIECE Filed March 23, 1934 4 Sheets-Sheet 2` l l/ l 1 ATTORNEY nrnl 16, 1935. E. E. BALDWIN 399997,57@

TIMEPIECE Filed March 25, 1934 4 Sheets-Sheet 5 April 16, 1935. E. E. BALDWIN TIMEPIECE 4 Sheets-Sheet 4 Filed March 23, 1934 Patented Apr. 16, 1935 UNITED STATES PTEN'E` @FFME 13 Claims.

revolving members, in place or" the more common hands, which dials, except the dials of the disc type, may expose their time-indicating iiguresor symbols through more than one opening in the clock face or casing, so that only one hour symbol is exposed to view at one time, and only one or a very few minute numerals at one time, and ii any second numerals, only a few, although the number of each kind may vary, so long as the main purpose is iullled ot enabling the time to be read more quickly and accurately from a clock face that shows gures or numerals marking the time at the moment of observation, in relation to a pointer on the dial.

The improvements herein set forth comprise essentially, in one or" the preferred embodiments of the invention, a series of parallel disks constituting clock or timepiece dials, one being an hour dial marked with hour symbols, another being a minute dial which is marked with minute symbols, and another a second dial which is marked with second symbols. The hour dial makes a complete revolution in twelve jumps, each numeral thereon remaining exposed to View through the openingin the clock face for one hour; and said numeral which is so exposed to indicate the hour being the only hour numeral visible through the hour opening in the clock face at any one time. The minute dial revolves continuously while it is driven by the motor, but at the expiration or the 60th minute it jumps ahead when disconnected from the motor and after it is placed under the action of a lever mechanism, the jumping action of the minute dial being together with that of the hour dial, and then the graduated lines of the minute dial pass the stationary pointer or arrow on the hour dial while the latter remains stationary; and a portion of the moving minute dial is shown through the same opening that displays the hour numerals, or through another opening adjacent thereto. A similar construction may apply to the third dial telling the tiene in seconds, though usually the second dial revolves continuously all the time Without any jumping action. Instead oi disk dials l may substitute drums, bands, or other revolving or moving members, for exhibiting time readings, as I shall explain in my discussion or" incdiiied or alternative forms. Electric motors and other appliances and appurtenances are utilized for actuating the movable elements in their proper relation and sequence, in so far as such devices may be required in the measuring oi time.

A fundamental idea of my improved clock mechanism is the way the time-indicating numerals are displayed, one primary object being to avoid the disadvantage found in many clocks and watches of the jump-numeral Variety of leaving doubt in the mind of the observer when he is reading time near the end of the hour as to 'whether the hour numeral has just changed or is just about to change. In my improved combination there is no doublt on this point, but absolute certainty, because hour and minute dials or flexible bands or other forms jurnp in unison at the expiration of each rotative period. For at the expiration of the 60th minute in every hour, both hour and minute disks, or other dial devices jump away from the opening in the clock face, and the next hour numeral or symbol and its corresponding zero point of the minute dial or disk or element take their places in front of the opening or openings. A blank space separates the 60th minute ci" a preceding hour from the zero point of the next hour as registered by the minute dial, drum, or flexible band, and this blank space, shows a denite starting point for the hour, and definitely and certainly separates it from the preceding hour, leaving no confusion in the mind of the erson reading the time as to whether the hour has just changed or is just about to change.

In the essential mechanism ci my present improvements employed for reaching the specified objectives oi the invention, the hour dial is normally locked in a stationary position while the minute dial is revolving continuously. At the end of each hour, at the time when the jump is taking place from the end of one hour to the beginning of the next, the hour disk is released from its stationary position and is connected to the minute dial, so that they jump together, because at the instant oi the jump the minute dial is released from the driving train which actuates it continuously, and the hour and minute dials being then connected together jump in unison. At the completion of the jumping action, the hour disk is released from the minute disk and lockedY again in a stationary position for another hour, while the minute disk is re-connected to the continuous drive so that it will resume its continuous revoluti n for another period of sixty minutes until again interrupted by the arrival of the next jump period when the hour numeral must again change.

so f;

The invention therefore comprises all these essential features, and moreover consists alsoin numerous details and peculiarities in the construction, combination, and arrangement of parts, and in various .modifications alternative and equivalent forms, novel extensions of underlying mechanisms, substantially as will be hereinafter described, and then more fully pointed out in the ensuing clauses of claim.

In the accompanying drawings illustrating my invention:

Figure l' is a vertical section of one leading form of my improved clock mechanism, which is shown in Figure 6.

Figure 2 is a detail side elevation of the main essential operating parts whereby the hour and minute dials are locked together during the jump, and shows their interlocking relation during the jump period when they are jumping in unison.

Figure 3 is a similar view of the same parts, 'but showing the relative position of the same when they are unlocked from eachother, the hour disk being held stationary and ,theV actuat- :ingV mechanism of the minute disk being connected with `the continuous drive. Y n

Figure fr is an enlargedvertical section of the mechanism when modified to be used with drum dials.

Figure' is an elevational vieu/,showing a modication thatutilizes drums and endless bands,

a part being in section. Y

,Figure 6 is a` front view of a clock casing for the form of clock mechanism using parallel disks fordials, as in Figure l.

c vFigure '7 is a front View of a clock casing for clock mechanism usinga drum dial.

Figure 8 is a front View of a clock casing for clock mechanism using drums and endless bands. Similar characters of reference denote like parts'throughout all the different figures of the drawings.

. The stationary arrow or pointer at B, adjacent to the hour and minute graduation marks, indicates the exact moment of time being indicated and isran important feature. Y

VThe main frame i of my improved clock,

watch, or other timepiece, (see Figures l and 6) may have any dimensions, shape, quality, ma-

terial, special function, and use; and that speci- Ytrains of gearing and drive gearing and other actuating devices for the dials and the rest of the time-indicating mechanism.

An electric motor, as A, in this exampie of the invention, is localized within fra-ine iii, at the base, where it can be held securely, as shown in Figure 1. Motor A drives its shaft on which is a Ydriving pinion it that meshes with a large gear wheel i?, whose hub l5V is mounted revolubly in the rear wall of casing l, at some suitable point in the rear side thereof, and said hub i5 .projects behind the rear wall of the case i into Van enveloping recess i2 in the form of a manual disk, handle, or knob Hi, which can be`manipulated to turn hub i5 and gear wheel Vi a greater `or less number of revolutions as may be needed to set the dials of the clock sothey will indicate `or mark the correct time, or otherwise. The hub i5 is also horizontally slidable in and out so as temporarily to disengage the gear wheel i? from the pinion i6 to enable wheel i'i to beY freely turned one Way or the other in setting the dials. A nat spring 2Q tensioned between the inner frame i3 and gear wheel il acts to return the wheel i? to its normal position in mesh with pinion I6 after a correction or change in the position of the time-marking mechanism by resetting has been made.

On thehub l5 of gear wheel i?, and fast with said hub and gear, is a reducing gear wheel i3 of much smaller diameter than gear wheel Si, which smaller gear wheel i8 revolves with wheel il and engages and drives a gear wheel iQ on a short shaft mounted in a bearing E@ fast in frame i3, which shaft also carries a gear wheel 2i that engages and drives a gear wheel 22 that is fast on the hub of a disk 23, having at equidistant intervals the V -shaped notches 38, which divide the circumference of disk 23 into twelve equal parts corresponding to the requirements of the twelve-hour system of reckoning time.

, A horizontal shaft l2, serving as the main drive shaft or spindle for the dials or disks, is supported in bearings'in the front and rear parts of frame i3 so that` it may revolve easily, the bearing for the rear part of shaftV i2 being directly in the rear part of frame i3, while the bearing for the front end of shaft i2 is directly in the sleeves or hubs of disks or other parts that have their revoluble support in the front part of frame i3. And fur ther the shaft l2 enters a central bore in hub -i ofY gear wheel il to which hub the shaft is splined or feathered to permit the aforesaid horizontal adjustment of wheel li in setting the dials; and also the splining of these parts together makes it possible forthewheel il and gear it to continuously rotate the shaft i2 when the motor A is in operation. The front end of shaft i2 carries the second disk l l which is therefore continuously revolved.

Further, the combined wheels 22 and 23 are supported loosely on shaft I2 and revolve thereon when driven by the described train of gearing, andthey are driven continuously, and actuate `other Aassociated parts while connected therewith and at alltimes except atcertain Vstop and jump periods at the end of eachhour as will be presently explained. Therefore the combined wheels 22 and 23 may be treated as the main gearing of the continuous drive, and their construction and combination may vary within wide limits, and made in one or two parts, provided one part is actuated by gear wheel 2 i, while the other and larger part has a series of V-shaped peripheral notches 33 that divide the circumference of wheel into twelve parts corresponding to twelve hours. As one-twelfth of the circumference of wheel 23 is skipped at each hour, when the jump at one oclock, two oclock, three oclock, and so on takes place, wheel 22 must have an additional number of teeth so that eleven-twelfths of one revolution will equal one hour in time. The jump takes perhaps one, two, or three seconds, and is taken care ofby the wedge or V-shaped angle of the teeth 38 in periphery of wheel 23, and V-lug fifi' on slide 2'? which when snapping into place brings the dials to correct alinement and correct time.

On the front of the clock casing l is an opening 3, through which the hour numerals are eX- posed on the hour disk 6, said numerals running from l to l2, for example. The clockcase also has an opening which may be a part of opening 3, or a separate one, as preferred, through which opening i the minute disk 9 exposes a portion of :Tail

its face as it revolves, said minute disk having a series of figures running from Dto G to indicate sixty minutes. There also may be or may not be a third opening in the face of casing i, either separate from or a part of the other openings,

through which the second disk Il shows itself, a part at a time, the symbols thereon running from l to @il in a circular series. Said second-marked dial ii is secured to the end of drive spindle l2 by which it is continuously driven while the clock is running, the train of gearing from motor A eflectuating this revolution of spindle I2 as already explained.

The disk 9 which carries the series of gures from il to B forming the minute dial, functioning like the ordinary minute hand, has a central hub le loose on shaft l2 and revolving within a h ib or sleeve 'i on the hour disk 5, which hub thus furnishes a bearing for the hub i3. The hubs 1 and I0 thus telescope within each other, and hub l on hour disk 5 revolves loosely in a bearing in the front part ci inner frame I3. Furthermore hub l, thus a part of hour disk carries xedly on its inner end the wheel 8, shown in iront outline in Figures 2 and 3, having twelve teeth 4B, corresponding to the twelve hour divisions of time, between which teeth 4!! are preferably the curved or concave recesses in the periphery of wheel 8.

The hub i0 of the minute dial 9 is relatively long and extends for some distance into frame i3 to a point close to wheel 23, so that spindle l2 is surrounded and enclosed thereby for a substantial distance, as shown in Figure l. And on the inner portion of hub il! is keyed or otherwise secured rigidly thereto the carn 25, on whose hub 43 is secured a single-notched disk 26.

It is quite possible that the cani 125 and disk 2B may be made in a single piece, for they unite together into a single entity, and when made as two elements they vare closely united as shown, the hub 43 having disk 26 mounted rmly thereon, and as said hub is keyed to the minute dial hub I0 they will revolve in unison or will stop their joint revolution when the agen-t that revolves them intermits driving them. The combined disk and cam are driven continuously by lthe driving mechanism, so long as wheel 23 is connected to the said combined cam and disk, the connection being made by means of slide 21 and connection being broken at the end of each hour by the action of said slide.

Alongside of disk and supported diametrically across the same, so as to be endwise movable, the sliding member r bar El, (shown in dotted outline in Figures 2 and 3, and in section in Figure l), having a V-shaped right-angled lug 45% at one end adapted at times to take into one ci the V -notches 3S of the periphery of disk and thus connect thecontinuously driving mechanism with the combined disk and cam, and adapted at the proper times to engage these notches 3B successively at intervals an hour apart. Slide 21 has a long slot 45 in the middle part thereof that encloses sleeve 43 therein of cani 25, so that the travel of slide 2'? may thereby be guided, controlled and limited, as shown in Figures 2 and where its different positions appear. vSlide 2l moreover has a lug 45 thereon, near the head of slide, which projects at right angles and passes through substantially coincidental slots in the cam and disk 26, whereby the slide 2 is still further guided, limited and controlled in its movement. The projecting lug is long enough to enable it to engage the teeth f4!) of the toothed movements are made possible by the provi Athe functioning these dials of the Vhour wheei 8 when the slide is in one of its positions as shown in Figure 2, at which time the continuous drive is disconnected and the hour and minute dials are connected together` at the moment of the jump action. At this time the slide is in its inner or depressed position, not only with the lug 45 engaged with wheel Si, but with the ilshaped lug 44 on the other end disengaged fr the toothed wheel 23. A lso the slide 2l is provided under the lug 45 with a pin l that enters a recess in the disk 25, and is provided with an enclspring 48 that is tensioned between the botte.. the recess and the lug 65, so as to have the effect to normally urge the slide upwardly or outwardly' into the position shown in Figure 3, where the lug 45 is disengaged from wheel 8 and the xl-lug is engaged with one of the notches 33 i disk and where obviously the continuous dln/ing gear is connected up for dial rotating purposes. Also the slide at the end that carries lug 535 has a head 49 curved in an arc of the periphery oi disk to which it is adjacent.

i Figure 3, the head rid of slide i enough into its outer position so t slide head as snown in Figure 2, the slide 2 is moved lengthwise the tension of spring A8, during the Wheel 2S for the length of notch iut when the end of the notch is reached other agency acts to lift the lever head el' into its raised position as shown in Figure 3, the retracted spring 4S expands and lifts on the slide to restore it to its former pos'ion where the J-lug ad engages wheel 2S again and the continuous drive actuates the minute dial continuously.

In the operation oi my improved cock 1 nisin of the class described for pupose stated, to drive the minute dial continuously except at the end of each hour the minute dial the hour dial are connected together so that they can inake jointly a jump that will advance the hour dial by one hour, changing the hour aber to the next successive 'number and siniuliauusly advancing the minute dial from its :n minute graduation to a zero graduation removed therefrom by a blank space, jump or the disks belonging to the two dials identical in length for at this time the two dials are locked together' for joint movement. These functions and relative on cf the means `for interlocking the minute and hour dials, and for unlocking them, and for controlling continuo-us movement of driving means.

` The features contributing to these results a clearly indicated in Figure.. '2 and 3. A lever is secured fast cn a rotary stud or pivot on ywhich at a short distance from lever l secured slide while the head il of the lever is in the notch the width of head Il i.

'head 35 is engaged as in Figure 3 lever si will be outside or notch lit. When lever head di is in notch d5 the slide is depressed, the slide is disconnected from continuous driveV wheel 23, and the hourand minute dials are interlocked so as to make the jump at the end of an hour, the lever head 3E t this time being set free from its stationary hold on the hour wheel il, so that the latter' may jump with the minute dial.

Another lever or catch 3d is pivoted at 35, and has a pointed tooth 33 that rides on the periphery or" cani 25. Lever ,341 ispressed against the. cam by spring held rigidly at Si on some part of the traine. ri'zhe salient part of cain 25 is adjacent to a section 2da having a length suiiicient to permit lever Sil to act against the cam to rotate it while the hour and minute dials are interlocked while making the hourly jumpA When the head lli of lever 2Q has reached the end of notch fl, the tooth 33 has acted against the cam sufficiently to throw thelever Si, over far enoughto cause a projecting lug 32 thereon 4toiact against lever 28 and push its head between two of teethle oi hour wheel 8, bringing the latter to stationary position, simultaneously with which the head il is lifted out of notch l5 so that it can travel on the periphery of wheel 26. ,The spring i3 restores the slide 2 to a position where its lug il@ engagesV a V-notch 38 in wheel 23, thus again connecting the continuous drive with the minute dial,` and placing the other parts in the positions that enable the orderly sequence of movements to occur until the next `jump period arrives and iinds the lever head il again ready to drop into notch (i5, and the toothed lever ready to drop oi the salient part of the cam, and the other changes ready to take place to permit another hourly jump to be perfected in the routine already detailed.

The cam 25 has its salient vpart reached in its revolution by the tooth 33, before said tooth reaches the section 25a extending from the periphery of the cam at its highest part to a point inward and near to the center. When point 33 is thus pressing against the cam and slide-carrying wheel, now free to revolve because disconnected from the continuous drive, it will rotate the united hour and minute dials due to the pressure of spring Si thereagainst, thus causing what is heretofore denoted as the jump. When the point 33 oi lever 35 is traveling on the periphery or" cam 25, except the portion 25a,

the' lever 3A; will hold its lug 32 retracted away from lever 28, but when point 33 drops off the high point of the Cain and rides on section 25ct the lug 32 approaches and acts against arm 25, as shown in Figure 2, and the spring 3l forces lever 34?- inwardly and its lug presses lever '23 towards the clock center and holds the head 35 in engagement with wheel 8 to anchor same in its stationary position, until vhead il of lever 29 is again allowed to drop onto the circumference or disk 25 due to the rising portion of the cam acting on point 3S, keeping head 35 of arm 28 in the locked position with Wheel 8 until head il of lever 28 again Yenters notch it of disk 26, .thus timing the `jurnp to'one hour intervals. Y i

The invention am now describing may be applied for use in many cases besides those in which dials marked on disks are substituted for ordinary clock hands to mark time in like inanner. Thus far in my description I have been speaking oi` dials consistingoi numeral-marked disks and the mechanism for operating them. But it will be obvious that in lieu of a disk I may utilize a rotary drum Von which the time figures are marked, one or more drums as shown in Figure 4, and asindicated with a clock casing in Figure '7; or I-may utilize iiexible bands ,marked with time figures, which bandsv pass around a pair of drums that are electrically or mechanically driven so as to propel Athe continuous bands or belts past slots or openings through which the time marks are `displayed' in the saine manner as in Figures l and 6, this endless belt form being shown in Figures 5 and 8. Other equivalent carrier devices for the time symbols to enable them to be successively displayed through windows in a casing may be Voriginated and adapted for use on the same prinyciples as govern the forms I am illustrating and describing, it understood that the samev actuating mechanism as that given in Figures l, 2, and 3 for driving Aand controlling the operaion oi the disk dials, will be used for the drum dials, the endless bands, and other equivalent forms, with only suchchanges, variations,V or modiiications as may be essential to .adapt the `said mechanism.- for proper and successful coders, to be mounted revolvably within, so as to be able to revolve and show their symbols or markings through openings or windows, as a for the hour figures on the hour drum or dial, b for the minute gures on the minute drum or dial, and c for the second gures on the second drum or dial. The hour dial has a series of numbers from l to S2 marked on the hour drum 52; the minute dial has a series of numbers from il to te marked on the minute druin 53; and the second dial a series of numbers from i to 3S marked on the second drum Sil. Within casing 5S near 'the top is an inner frame 5l securely placed, and near the bottom is another inner frame 55, securely placed, said frames 5i and 55 being to hold kand support the various parts of the operatindmechanism. The three drums or cylinders o2, 53, and 54 revolve within the Window-provided casing 513 and expose their numerals to view through the window or windows in like manner as the dials show their gures through the openings, in connection with the mechanism shown in Figures l, 2, and 3; and this same operating mechanism, somewhat rearranged to adapt it to operate the drums of Figure 4, is employed in this form of the invention.

Located within lower inner frame '55 is an electric or other motor A, on the shaft of which is a driving pinion 'iS that engagesand drives a gear wheel il, formed integral with-a vertical sleeveV iss Cil

revolving in a bearing in the bottom of frame 55, and having on its lower end a button or knob outside of frame S by which it can be rotated to set the clock dials and other mechanism in correcting the time, etc. By pushing inward on knob 5e the gear wheel 'H can be temporarily disengaged from pinion iii, so that the flat spring 'i2 will ce compressed and then the sleeve 5S can be turned by hand to set the parts, and when this is done he spring 'l2 will return the gear 'el into with drive pinion iE. The sleeve splined to the main spindle 56 that runs into it, which permits it to be movable endwise in making adjustments and also connects the gear wheel li to the spindle so that it will actuate it,

This spindle is long. and extends vertically through all the drums 52,53, and 5A. On its upper end near where it is journaled in a bearing in frame 5i is a drive gear wheel i3 which forms a part oi the train for the continuous drive of the minute druir. 53. Shaft 5% is clso secured centrally within the seconds drum M and imparts a constant revolution thereto as it is driven by the motor. The minute drum 53 has a central hub o: UA

` 5l held firm by braces lil, within which the spindle 56 runs and revolves, said hub having secured thereto near its upper end the slotted cam and, single-notched disk 2S carrying lug-provided and spring-controlled slide 2l', said slide being contiguous to the continuous drive disk 23 having V-notches i entered successively by the V-shaped lng mi on slide 2i, whereby the jump at the end of each hour is provided for. And further, the hour drum 52 has a central integral hub 'i3 that carries fast thereon the twelve-toothed hour wheel 8, having teeth 4i), in connection with which operates the lug on slide 2l, the latter having pin il and returning spring 48.

It will also be seen that the gear wheel i8 on drive spindle 5t engages and drives gear wheel ig, carried on stud 2G on frame 5|, which stud 213 also carries a smallerrgear 2l `that engages and drives `a gear wheel l22 secured to or made a part of V-notched disk 23. The combined gear wheel .22 and disk 23 form a part of the continuous driving mechanism that actuates the minute drum continuously. The operation of all these parts is the same as that of the similar parts in Figures l, and 3, and the jump made at the end oi each hour when the .hour drum and minute drum are temporarily locked together, and they are clisconnected fromthe continuous drive is the same, and I do not iind it necessary to describe or repeat here in detail what I have presented at length in describing the operation of the parts in Figures l, 2, and 3.

Passing now to describe the endless band form of dial running over actuating drums I refer to the details brought out clearly in views in Figures 5 and 8. The drums are arranged and actuated in very much the same way as in Figure 4, with sorne differences of detail of which I will speak, but whereas in the form of the invention in Figure e there are hour, minute, and second drums, on which the numeralsare marked, in this last alternate iorm the drums, one or more, serve to drive or propel endless flexible bands or belts on which the ninnerals are marked. In the example I descri ing I have represented only two bands, one for an hour dia-l, and one for a minute dial. rIhe actuating drums may be at one or both ends of the clock, but it will usually be suicient to actuate the bands at only one point. The bands may carry one or several series of figures or symbols, that is to say, thehournumerals may run from l to I2, and then again from I to I2, so that each of the parallel sides of a band will show a series of figures, and thus time can be read from two or more sides of the clock, it being easy to make suitable provision for this duplication. The opposite openings are shown at d and d' and at e and e in Figure 8. As the bands or belts are so much longer than dials or drums and the time numerals have to travel iurther I provide in the actuating gearing trains some supplemental additions of multiplying gearing to speed up the movement, but do not wish to be conned thereto, as its use will depend on the size and function ci such a clock.

represents a casing adapted to contain the mechanism of a clock having numeral-marked bands to serve as dials, of which I show two, an band and a rninute band i. rihe hour band 53 is driven by the drum Si, which has a sprocket wheel formed on the outside thereof near the upper end and consisting of a series of teeth Sla that take into the holes in the band 63 and thus drive the band; and the minute band e4 is driven by the drum @2, which has a sprocket wheel formed on the outside thereof near the lower end and consisting of a series of teeth 62a that take into the holes @lla in the band @il and thus drive the band. Drum 53 is above band Sli. In fra-nie or casing Eil, see Figure 5,'nea1' one end is an upper frame $5 and a lower frame 36, designed to permit the drums and the mechanism for driving them to be properly supported. In lower frame i is an electric or other motor A, on whose shaft is a pinion lea that engages a gear wheel li, the saine as in Figure 4, on a sleeve 5S having a knob or handle 59, for use in setting the hands, the gear Il being engageable with or disengageable from the pinion Eta and Under the control of iiat spring '52. Main spindle 5e, the saine as in Figure i is arranged very much the same as in Figure l and carries a drive gear that actuates a train of gearing as in Figure 4, being substantially the saine parts, operating in the same way for the same purpose.

One difference however deserves to be mentioned and consists in the interpcsition of speeding up gearing to increase the speed of the travel of the bands. Instead of having the hour drum hub 54, (which is the equivalent of hub 'i3 in Figure ll) secured to the twelve-toothed hour i wheel 8 I have inserted a train of gears between hub 24 and wheel 8, consisting of pinion 8S formed on hub Sil, which meshes with gear wheel 85.3, on a stud on the frame 65, which wheel 8) carries a srnall pinion 8l that drives a gear wheel 82, whose hub is secured to the twelve-toothed wheel 3. And also, instead of having the minute drum provided with a vertical hub as 5l which is connected to the cam and slide-carrying members, said minute drum (in this instance drum 6E) has central downwardly extending sleeve or hub Si, which connects with the said cam and slide-carrying members through a train comprising pinion i8 on the hub 85, that engages gear wheel 'l5 on a stud on frame 86, which gear 'l5 carries an attached pinion it, that engages a gear wheel 'i that is integral with cr secured to the long sleeve i9 which is secured to the coinbined cam and slide-carrying elements aforesaid, by which interposed train the movement of the band Sais speeded up the same as speed of band 63. While the drums at one end of this form of clock drive thekbands or belts, drums at the other end may be suitably arranged, as with a spindle Cil 84, to merely support the bands in their travel without driving.

Many other changes in the embodimentf the invention may be made within the purview of the claims,V and I therefore reserve the liberty and privilege of rearranging the parts of the invention, substituting other mechanical equivalents and Vnovel featuresdesigned to more effectually fulfill the requirements of my essential purposes, but not departing fromthe'scope of the claims.

What I claim, is:

1. In a timepiece mechanism of the class described, a casing, an hour dial exposing only one symbolrat a time, in combination with a minute dial thatv exposes Yonly a portion at one time, the hour dial having a continuous series of symbols, and the minute dialhaving a series of symbols with a blank space betweenfhe marks @a and il, said hour and. minute dials having central tele"- scoping hubs, one of kwhich is revoluble within the other, and both of which are revolubly mounted, means for locking the hour and minute dials together at the end or each hour and causing them jointly to jumpahead, the hour dial .to the next hour symbol and-the minute dial to its zero graduation, and means for holdingfthe hour dial stationary and for continuously revolving the minute dial the rest of the time, said blank space between the marks i and E3 serving to denitely show that the hour has just changed.

' 2. In a timepiece mechanism of the class de- Y scribed, a casing, an hour dial exposing one symbol at a time, in combination with a minute dial exposing a portion only at a time, the hour dial Yhaving a continuous series of symbols, and the Y hour symbol at the end of the jump, and means for holding the hour dial stationary and for continuously revolving the minute dial except at the jump periods, said blank space between the marks E@ and t serving to definitely show that the hour has just changed. Y

d 3. In a timepiece mechanism of the class-described, the combination of a casing having an opening therein, an hour dial exposing only one symbol at av time, a minute dial that exposes only a segment at one time, said minute dial having markings thereon and a blank space between the last and irst graduation equal in length to one-twelfth of the circumference, actuating gearing for driving the minute dial continuously except at the end of each hour, the same including a plural-notched disk, a plural-toothed wheel rigidly secured to the hour dial, means for disconnecting the continuous drive gearing at the end of each hour and locking the hour and minute dial mechanism togetherat the same moment, the same including a single-notched disk, a rotary cam combined therewith, a lug-provided reciprocable slide diametrically supported on the single-notched disk, and operating in connection with the toothed hour wheel and the pluralnotched disk, together with cooperating lever devices, all arranged to cause the vhour and minute dialsf'to jump ahead the length of said blank space when'they are interlocked, so Vthat a new hour symbol and the zero point on the minute dial may be exposed, said zero point being opposite to the hour symbol, and so that the hour dial may be held stationary and the continuous drive may be reconnected to the minute dial at the end of each jump period.

4. In a timepiece mechanism if the class described, the combination of an apertured casing, an hour dial having a single symbol exposure, a minute dial having a segmental exposure, the hour dial having a continuous series of symbols, and the minute dial having a series of symbols and a blank space between the last and rst marking thereon lequal in length to the distance between two adjacentrhour symbols, said hour and minute dials having central telescoping hubs, means forlocking the hour and minute dials together at the end of each hour and causing them to jointlyv jump ahead, the hour dial to the next symbol and the minute' dial to the end of the blank space, and means for holding the hour dial stationary the rest of the hour and for continuously revolving the minute dial at the same time.

5. In a timepiece mechanism of the class described, the combination of an apertured casing, an hour dial having a single symbol exposure, a minute dial having a segmental exposure, the hour dial having a continuous series of symbols, and the minute dial having a. series of symbols and a blank space between the rst and last marking thereon equal in length to the distance between two adjacent hour symbols, means for locking the hour and minute dials together at the end of each hour and causing them Vto jointly jump ahead, the hour dial to the next symbol and the minute dial to the end of the blank space, and means for holding the hour dial stationary the rest of the hour and for continuously revolving the minute dial at the same time, said means consisting essentially of a continuous drive gearing, a twelve-toothed hour wheel, a singlenotched disk, a cam combined with it, a slide that coacts with the hour wheel and the continuous drive, and cooperating lever devices.

6. In a timepiece mechanism of the class described, the combination of an apertured casing, an hour dial having a single symbol exposure, a minute dial having a-seg'mental exposure, said hour and minute dials having central telescoping hubs, one of which is revoluble within the other, and both of which are revolubly mounted, means for locking the hour and minute dials together at the end of each hour and causing them jointly lto jump ahead, thehour dial to the next hour symbol and the minute dial to its zero graduation, means for holding the hour dial stationary and for continuously revolving the minute dial the rest of the time, a main drive shaft on 4which the telescoping hubs are loosely mounted, and a dial marking seconds and having a segmental exposure, said seconds dial being secured to the drive shaft so as to revolve continuously all the time.

7. In a timepiecemechanism of the class described, the combination of a casing having an opening therein, an hour dial exposing only one symbol at a time, a minute dial that exposes only a segment at one time, said minute dial having markings thereon and a blank space between the last and iirst graduation equal in length to one-twelfth of the circumference, actuating gearingrfor driving the minute dial continuously except during the jump at the end of each hour, the

and the continuous drive, andcooperating lever devices.

13; In a timepiece mechanism of the class described, the combination of an apertured casing, an hour dial having a single symbol exposure, a minute dial having a segmental exposure, the hour dial having a continuous series of symbols, and the minute dial having a series of symbols and a blank space between the last and rst symbols equal in length to the distance between tWo adjacent hour symbols, said hour and minute dials having central telescoping hubs, one of which is revoluble within the other, and both of which are revolubly mounted, means for locking the hour and minute dials together at the end of each hour and causing them to jointly ahead, the hour dial to the next symbol and the minute dial to the end of the blank space, a pointer on the Clock face for exactly marking the limit of the jump and l the location of the Ydial figures at each period, and means for holding the hour dial stationary the rest of the hour and for continuously revolving the minute dial While the hour dial is stationary, said blank space serving as means to definitely show that the hour has just changed and leaving no doubt in the mind of the person telling the time as to whether the hour` has just changed or is just about to change.

EDWARD E. BALDWIN .Y 

